Blue anthraquinone dye.



' fication of the Letters Patent No. 631,606,

:are obtained. Further, it is known that if able solvent halogen substitution products NITED STATES PATENT FFICE.

OSCAR BALLY, OF MANNHEIM, GERMANY, ASSIGNOR TO THE BADISCl-IE ANILIN AND SODA FABRIK, OF LUDWIGSHAFEN, GERMANY.

BLUE ANTHRAQUINONE DYE.

SPECIFICATION forming part of Letters Patent No. 648,331, datedApril 24, 1900.

Application filed tTannary 24, 1900.

To aZZ whom it may concern:

Be it known that I, OSCAR BALLY, doctor of philosophy, a citizen of the Swiss Republic, residing at Mannheim, in the Grand Duchy of Baden and Empire of Germany, have invented new and useful Improvements in C01- oring-Matters of the Anthraquinone Series, of which the following is a specification.

It is known that if dinitro-anthraquinone be boiled with anilin or with other primary aromatic amins dianilido-anthraquinones or the homologous dialphylido-anthraquinones these products be treated with an excess of chlorin or bromin in the presence of a suitare obtained. (See, for instance, Letters Patent No. 631,606.) I

My present invention relates to the manufacture of new coloring-matters by treating the said halogen derivatives with concentrated sulfuric acid and boracic acid and subsequently converting the products thus obtained into sulfoacids soluble in water by sulfonation.

The following; example will serve to illustrate my invention and the manner in which it can best be carried into practicaleifect and the new coloring-matters obtained.

Example: Mix together one hundred (100) parts of the bromin derivative of dianilidoanthraquinone, such as can be obtained according to the second example of the specifree from water. Add this mixture to about two thousand (2,000) parts of concentrated sulfuric acid, (containing about ninety-six per cent. H 80 Stir for about twenty-four hours at the ordinarytemperature. The melt 4o assumes a beautiful violet color. To complete the reaction, heat the mixture for about twelve hours at a temperature of about 70 to 100 centigrade. Then in order to sulfonate the product add about two thousand (2,000) parts of fuming sulfuric acid (containing about forty per cent. free anhydride) to the melt and heat the mixture to about 1300 centigrade and continue heating until the coloring-matter is readily soluble in Water. Work up the melt in the usual way by diluting the melt, salting out the coloring-matter with common salt-,andfiltering. The coloring-matter is then obtained in the form of -a bluel paste, which when dry yields a violet: blue powder.

It is moderately soluble in water, givinga blue solution. In alcohol and anilin it dissolves, giving a pure blue color. In caustic soda the solution is green-blue and green in concentrated sulfuric acid. My new coloring-matter thus obtained dyes unmordanted Wool, giving blue'shades, and chrome mordanted wool, giving greenish-blue shades. Similar products can be obtained in an analogous manner by treating the chlorin derivatives of dianilido-anthraquinone or the halogen derivatives of other alphylido-anthraquinones in a similar way. The properties of the products so obtained can be seen and one hundred (100)parts of boracic acid from the following table:

a e s a a. n C0l0ring-matter fromg g 5 4; 2' g 5 B33 0 0 Q Q ,5 .53 q ,5 =33 n 0 042 CD B m o Q 7- o o has as i 588.2 "E? '35? a 8 o 0 1 o Brom 1.5-dianilido-an- Blue Violet Moderately Green blue Green Blue Blue Blue thraquinone. if) 1 u b l e;

ue. Brom 1.8-dianilido-am Dark-green Black with Green-blue Blue-green do .do ..do Green-blue;

thraquinone. blue. {I16 t a 11 i c uster. Broni1.5-di-para-toluido .do do Very slight- Slightly do ..do ..do Blue-green.

anthraquinone. ly soluble; s o lu b 1 e blue. green. Ohlor 1.5-dianilido'an- Dark blue do Blue Green-blue Blue-green Blue -vio .do Violet-blue.

thraquinone. let.

In my present application for patent I desire to claim generically my new coloringmatters that can be obtained from the halogen derivatives of dialphylidoanthraquinone,and specifically I desire to claim that coloringmatter which can be obtained by the treatment of the bromin derivative of 1.5 dianilido-anthraquinone with concentrated sulfuric acid and boracic acid and subsequently with fuming sulfuric acid in the manner illustrated in the example.

Now what I claim isy 1. As a new article of manufacturethe coloring-matter which can be obtained by the treatment of a halogen derivative of alphylidoanthraquinone with sulfuric acid and boracic acid and subsequently sulfonating, and which is characterized by the following properties: it contains halogen, it is soluble in water, in caustic-soda solution, in concentrated sulfuric acid, in alcohol, and inan lin, and it dyes unrnordanted woolgiving shades within the range from violet-blue to bluish green all substantiallyas described.

- witnesses.

2. As a new article of manufacture the new .color which can be obtained by treating brom 1.5. dianilido anthraquinone with sulfuric acid and bor'acic acid and subsequently sulfonat-ing and which contains halogen, is mod- Y erately soluble in water giving a'blue color, soluble in alcohol and anilin giving a pure blue solution, and which dyes uumordanted OSCAR 'BALLY.

Witnesses:

ERNEST. G. EHRHARDT, PERCY J. JONES. 

